Inter-Chunk Popularity-Based Edge-First Caching in Content-Centric Networking

Content-centric networking (CCN) is considered promising for the efficient support of ever-increasing streaming multimedia services. Inter-chunk popularity-based caching is one of the key requirements in CCN multimedia services because some chunks of a content file tend to be requested more frequently than others. For multimedia contents, forepart chunks often have higher popularity than others as users may interrupt and abort before finishing its service. This paper presents a novel cache replication scheme, which places more popular chunks ahead on the edge router, and establishes a cache pipelining on the relaying routers along the path to reduce user-perceived delay. Simulation results show that the proposed scheme incurs less delay and reduces the overall redundant network traffic while guaranteeing a higher cache hit ratio.